Removal device and removal method

Abstract

To provide a removal device and the like capable of easily removing covering material such as asbestos.SOLUTION: A removal device 1 is to remove covering material 4 attached on a metal folded plate 3. The removal device 1 comprises: a body 2 in a box shape constituted by a lower box 10 of which an upper surface is opened and an upper box 20 of which upper and lower surfaces are opened, to place the metal folded plate 3 clamped between the lower box 10 and the upper box 20 to penetrate through the inner space; a transparent surface member 30 arranged in the upper surface of the upper box 20; and gloves 31 through which hands are put into the inner space from the outer side of the body 2. A pair of wall parts of the lower box 10 and the upper box 20 opposite to each other have shapes corresponding to a cross shape of the metal folded plate 3.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a removal device for removing covering materials such as asbestos. [Background technology]

[0002] Patent Document 1 describes a method for removing coating material such as asbestos that has adhered to steel beams, in which a transparent cover is placed to cover the sides and underside of the beam, a solidifying agent is sprayed onto the coating material inside the cover to solidify the coating material, and then a cover is placed against the solidified area to remove the coating material in another area.

[0003] Also, there is known an asbestos removal method that uses a bag with a protective sheet and gloves attached, called a glove bag (for example, see Non-Patent Document 1). A typical removal method using a glove bag involves fastening the end of the bag to a member such as a pipe with tape or the like to cover the member, inserting the hand into the glove, and removing the asbestos, etc., that has adhered to the member within the sealed bag. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5635306 [Non-patent literature]

[0005] [Non-Patent Document 1] "Comprehensive Manual for Preventing Asbestos Exposure and Preventing Asbestos Dispersal and Leakage During the Demolition of Buildings, etc." Gyosei, May 2021 Summary of the Invention [Problem to be solved by the invention]

[0006] Asbestos and other coating materials have been used in various places in the past for insulation and heat retention purposes. Folded-plate roofs are one example of such places, and when dismantling and replacing a metal folded-plate roof with an asbestos-containing coating material attached, it may be necessary to locally cut the metal folded-plate to which the coating material is attached.

[0007] In this case, the covering material must be removed in advance to prevent scattering of the covering material when the metal folded plate is cut, but if the method of Patent Document 1 is applied to this task as is, the work becomes cumbersome. Also, if the method using the glove bag is applied as is, it takes time and effort to attach and remove the sheet. This time and effort becomes particularly great for members with uneven cross-sectional shapes such as metal folded plates.

[0008] The present invention has been made in consideration of the above problems, and has an object to provide a removal device and the like that can easily remove covering materials such as asbestos. [Means for solving the problem]

[0009] The first invention for solving the above-mentioned problems is a removal device for removing a coating material adhering to a component, the removal device comprising a lower box with an open top and an upper box with open top and bottom sides, a box-shaped main body for placing the component sandwiched between the lower box and the upper box through an internal space, a transparent panel provided on the top surface of the upper box, and a glove for inserting a hand into the internal space from outside the main body, wherein at least one of the lower box and the upper box has a pair of opposing wall portions having a shape corresponding to the cross-sectional shape of the component.

[0010] By using the removal device of the present invention, a closed internal space can be easily formed for removing the coating material from the component while preventing the coating material from scattering, etc., and the work of removing the coating material in the internal space can be easily performed by putting one's hand in a glove. In addition, the main body of the removal device is composed of an upper box and a lower box, and at least one of them has a shape corresponding to the cross-sectional shape of the component, so that a closed internal space can be easily formed even for a component having irregularities such as a metal folded plate, for which it is time-consuming to attach a glove bag, etc.

[0011] It is preferable that the removal device further includes an insertion portion for inserting a nozzle used when removing the coating material. This allows the nozzle of a vacuum cleaner or a sprayer for a scattering inhibitor to be passed through the insertion portion when removing the covering material.

[0012] It is preferable that an elastic body having a gap is disposed between the walls of the upper box and the lower box. The elastic body is, for example, mohair. The elastic body brings the upper and lower boxes into close contact with each other, realizing a certain degree of airtightness of the internal space. Moreover, since the elastic body has voids, when the internal space of the removal device is made negative pressure to prevent scattering of the covering material, the internal space does not become excessively low pressure, and damage to the removal device can be prevented. For example, mohair made of hair-like fibers can be used as the elastic body, and the gaps between the fibers function as the voids.

[0013] It is also preferable that the removal device has a hook-and-loop fastener for removably connecting the upper box and the lower box. This allows the lower box and the upper box to be fixed together to maintain the internal space closed, and the removal device can be removed by releasing the fixed state of the lower box and the upper box. Also, by using a hook-and-loop fastener, the lower box and the upper box can be easily fixed together and released from the fixed state.

[0014] The second invention is a method for removing a coating material adhering to a component using the removal device of the first invention, characterized in that the method includes a step of positioning the component so that it penetrates the main body by sandwiching the component between the lower box and the upper box from above and below, and a step of inserting a hand into the glove and performing the work of removing the coating material in the internal space of the main body. A second aspect of the present invention is a method for removing a coating material using the removal device of the first aspect of the present invention. Effect of the Invention

[0015] According to the present invention, it is possible to provide a removal device and the like that can easily remove covering materials such as asbestos. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 shows a removal device 1. [Diagram 2] A diagram showing the lower box 10 and the upper box 20. [Diagram 3] FIG. 4 is a diagram showing a penetration point a of the metal folded plate 3. [Figure 4] 4A to 4C are diagrams illustrating a method for removing the coating material 4. [Diagram 5] 4A to 4C are diagrams illustrating a method for removing the coating material 4. [Figure 6] FIG. 4 is a diagram showing the metal folded plate 3 after the covering material 4 has been removed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0018] (1.Removal device 1) Fig. 1 is a diagram showing a removal device 1 according to an embodiment of the present invention. This removal device 1 removes a covering material 4 such as asbestos that is applied for insulation purposes or the like to a metal folded plate 3 that constitutes a folded-plate roof. The removal device 1 has a box-shaped main body 2, and the work of removing the covering material 4 is carried out in a closed internal space within the main body 2. A cross section perpendicular to the longitudinal direction of the metal folded plate 3 (hereinafter simply referred to as a "cross section") has mountain-valley-like irregularities.

[0019] The removal device 1 has a lower box 10 and an upper box 20, and the main body 2 is formed by placing the upper box 20 on the lower box 10. The metal folded plate 3 is sandwiched between the lower box 10 and the upper box 20 and passes through the internal space of the main body 2, and is positioned so that the removal range of the covering material 4 is located within the internal space. The lower box 10 and the upper box 20 are made of polystyrene foam and are lightweight, making them easy to transport and install, and also simple to process.

[0020] FIG. 2(a) is a perspective view of the lower box 10 as viewed from above, and FIG. 2(b) is a perspective view of the upper box 20 as viewed from below.

[0021] 2(a), the lower box 10 is a box-shaped member with an open top, and walls 12 are arranged on all four sides of the rectangular bottom 11 to surround the bottom 11. The bottom 11 has a sufficient thickness to satisfy the necessary strength, and a pair of opposing walls 12 of the lower box 10 are provided with a plurality of protrusions 121 on the upper edge that match the cross-sectional shape of the metal folded plate 3. In addition, except for the protrusions 121 and their vicinity, an outer portion 123 of the upper surface of the wall portions 12 protrudes upward in a stepped manner from an inner portion 124 thereof.

[0022] 2(b), the upper box 20 is a rectangular cylindrical member with the top and bottom open, and the top is closed with a transparent facing material 30. In this embodiment, a part of the glove bag is used as this facing material 30, and a glove 31 is attached so that the hand can be inserted from the outside of the main body 2 when removing the covering material 4.

[0023] 1, the face material 30 is also provided with nozzle insertion sections 32, 33. The insertion sections 32, 33 are portions through which the nozzle of a vacuum cleaner for creating a negative pressure in the internal space of the removal device 1 and for sucking up the covering material 4, or the nozzle of a sprayer for spraying a scattering inhibitor for suppressing scattering of the covering material 4, are inserted, and have a bag-like configuration.

[0024] 2(b), among the walls 21 of the upper box 20, a set of walls 21 at positions corresponding to the set of walls 12 of the lower box 10 has a plurality of recesses 211 on the lower edge that match the cross-sectional shape of the metal folded plate 3. In addition, except for the recesses 211 and their vicinity, an inner portion 212 of the lower surface of the wall 21 protrudes downward in a stepped manner relative to an outer portion 213 thereof.

[0025] Fig. 3(a) is a diagram showing a penetration point a of the metal folded plate 3 of the removal device 1 in Fig. 1. Fig. 3(b) is a diagram showing a cross section in the thickness direction of the walls 12, 21 taken along line AA in Fig. 3(a), and Fig. 3(c) is a diagram showing a cross section in the thickness direction of the walls 12, 21 taken along line BB in Fig. 3(a).

[0026] As shown in Fig. 3(b), at the penetration point of the metal folded plate 3, mohair 24 is provided between the wall 21 of the upper box 20 and the wall 12 of the lower box 10. The mohair 24 is attached to the lower surface of the wall 21 of the upper box 20. The mohair 24 is an elastic body having elasticity due to deformation and restoration of upright hair-like fibers, and gaps are formed between the fibers of the mohair 24. It is also possible to further provide mohair 24 on the upper surface of the protrusion 121 of the wall 12 of the lower box 10 to protect the protrusion 121.

[0027] Meanwhile, even at a position other than the metal folded plate 3, mohair 24 is provided between the wall 21 of the upper box 20 and the wall 12 of the lower box 10, as shown in Fig. 3(c). The mohair 24 is attached to the lower surface of the outer portion 213 of the wall 21 of the upper box 20. The stepped protruding inner portion 212 of the wall 21 of the upper box 20 is inserted onto the stepped recessed inner portion 124 of the wall 12 of the lower box 10, and the lower end of the inner portion 212 of the wall 21 of the upper box 20 is located behind (on the internal space side of) the outer portion 123 of the wall 12 of the lower box 10.

[0028] By providing the mohair 24 as described above, the lower box 10 and the upper box 20 are tightly attached with the metal folded plate 3 in between, so that a certain level of airtightness can be achieved inside the removal device 1.

[0029] 1, a reinforcing member 25 is provided on the top of upper box 20. Reinforcing member 25 is an angle member with an L-shaped cross section, and is positioned so that its inside corner matches the outer edge of the top of upper box 20. By positioning reinforcing member 25 so as to surround the outer periphery of the top of upper box 20, upper box 20 is reinforced and damage, etc. can be prevented.

[0030] To increase the strength of the polystyrene foam of the lower box 10 and the upper box 20, a urethane coating is applied to the entire surface (outer and inner surfaces). This prevents the removal device 1 from being damaged by impact. Furthermore, by smoothing the inner surfaces of the lower box 10 and the upper box 20 with a urethane coating, pieces of the covering material 4 are less likely to stick to the inner surfaces after removal.

[0031] The lower box 10 and the upper box 20 are connected and fixed by a hook-and-loop fastener 40. The hook-and-loop fastener 40 is a connecting member that detachably connects the lower box 10 and the upper box 20, and the hook-and-loop fastener 40 makes it easy to fasten the lower box 10 and the upper box 20 together and to release the fastened state.

[0032] (2. Method for Removing Coating Material 4 Using Removal Device 1) Next, a method for removing the covering material 4 from the metal folded plate 3 using the removal device 1 will be described. This removal method is carried out as part of the dismantling work of the folded plate roof.

[0033] As shown in Fig. 4(a), the folded plate roof 300 is formed by connecting long metal folded plates 3 in the width direction, and the covering material 4 is attached to the underside of the metal folded plates 3 of the folded plate roof 300. The width direction of the metal folded plates 3 corresponds to the left-right direction in Fig. 4(a). Although not particularly shown, adjacent metal folded plates 3 are connected by joints, and the wall 21 of the upper box 20 of the removal device 1 is provided with not only the recess 211 but also a depression 211a (see Fig. 3(a) etc.) corresponding to the shape of the joint of the metal folded plates 3.

[0034] In this embodiment, the work of removing the covering material 4 is performed on the folded-plate roof 300, and as shown in FIG. 4(b), first, a girder 201 for placing the metal folded plate 3 is installed at the work location. The girder 201 is a square timber or the like that is spanned across the width of the metal folded plate 3, but is not limited to this. A plurality of girder materials 201 are arranged at intervals in the longitudinal direction of the metal folded plate 3. The longitudinal direction of the metal folded plate 3 corresponds to the normal direction to the paper surface of FIG. 4(b).

[0035] Next, as shown in Fig. 4(c), the metal folded plate 3 is removed from the folded plate roof 300, turned upside down, and placed on the girder material 201. As described above, the covering material 4 is attached to the lower surface of the metal folded plate 3 of the folded plate roof 300, but by turning the metal folded plate 3 upside down, the covering material 4 is provided on the upper surface of the metal folded plate 3 when it is placed on the girder material 201.

[0036] Thereafter, as shown in Fig. 5(a), the lower box 10 of the removal device 1 is inserted between the metal folded plate 3 and the folded plate roof 300, and the above-mentioned convex portion 121 of the lower box 10 is positioned so as to engage with the cross section of the metal folded plate 3. Reference numeral 202 in Fig. 5(a) denotes a plate material on which the lower box 10 is placed.

[0037] 5(b), the upper box 20 is placed on the lower box 10 so as to sandwich the metal folded plate 3, and the two are connected and fixed by a hook-and-loop fastener 40 (see FIG. 1). At this time, the recess 211 of the upper box 20 is positioned so as to engage with the cross section of the metal folded plate 3.

[0038] After that, as shown in Fig. 5(c), both hands are put into the gloves 31 (see Fig. 1, etc.) and a scraping tool or the like is used to perform removal work such as peeling off the covering material 4. If necessary, a dedicated chair or the like for the worker to sit on can be installed on the folded plate roof 300.

[0039] At this time, the nozzle 203 of the vacuum cleaner or the nozzle 204 of the sprayer is inserted into the insertion parts 32, 33 (see FIG. 1), and these are operated by hand as necessary. Since the mohair 24 has gaps between the fibers, when the internal space of the removal device 1 is made negative pressure by the vacuum cleaner, the internal space does not become excessively low pressure, which may cause damage to the main body 2.

[0040] As a result, the coating material 4 attached to the folded metal plate 3 is removed in a strip shape, as shown in Fig. 6. After that, the removal device 1 is moved while removing the coating material 4 from multiple locations in the longitudinal direction of the folded metal plate 3, and the folded metal plate 3 is cut and shortened in these removal ranges, wrapped, and then hung down.

[0041] By repeating the above procedure, the metal folded plates 3 are successively removed and the folded plate roof 300 is dismantled. This allows the dismantling work of the folded plate roof 300 to be carried out without affecting the work under the folded plate roof 300. When the dismantling work is to be suspended, the removal device 1 is fastened to the folded plate roof 300 and the top of it is covered with a sheet or the like.

[0042] As described above, by using the removal device 1 of this embodiment, a closed internal space for removing the coating material 4 from the metal folded plate 3 while preventing scattering of the coating material 4, etc., can be easily formed, and the work of removing the coating material 4 in the internal space can be easily performed by putting the hand in the glove 31. Therefore, the equipment required for the removal work (for example, the installation of a security zone, etc.) can be made minimal, simple, and lightweight. In addition, the main body 2 of the removal device 1 is composed of the upper box 20 and the lower box 10, each of which has a shape corresponding to the cross-sectional shape of the metal folded plate 3, so that a closed internal space can be easily formed even for a metal folded plate 3 with an uneven cross section that requires time and effort for the attachment of a glove bag, etc.

[0043] In this embodiment, the nozzles 203 and 204 of a vacuum cleaner or a sprayer used when removing the covering material 4 can be passed through the insertion portions 32 and 33 of the removal device 1 .

[0044] In this embodiment, by providing mohair 24 at the joint between the wall 12 of the lower box 10 and the wall 21 of the upper box 20, the upper box 20 and the lower box 10 are tightly attached to each other, and a certain degree of airtightness of the internal space is achieved, thereby reducing air leakage from the internal space. Moreover, since the mohair 24 allows a certain degree of air to pass through its gaps and does not become too airtight, when the internal space of the removal device 1 is suctioned with a vacuum cleaner to create a negative pressure in order to prevent the covering material 4 from scattering, it is possible to prevent the internal space from becoming excessively low pressure, which would damage the removal device 1. Note that instead of the mohair 24, it is also possible to provide other elastic bodies having gaps, such as sponges.

[0045] In this embodiment, the lower box 10 and the upper box 20 can be fixed together with the hook-and-loop fastener 40 to maintain the internal space closed, and the removal device 1 can be removed by releasing the fixed state of the lower box 10 and the upper box 20. Furthermore, by using the hook-and-loop fastener 40, the lower box 10 and the upper box 20 can be easily fixed together and released from the fixed state.

[0046] However, the present invention is not limited to the above embodiment. For example, in this embodiment, a part of a glove bag is used as the face material 30, but a transparent plastic plate may be provided instead. In this case, the glove 31 and the insertion parts 32 and 33 are provided on the face material 30 in the same manner.

[0047] In this embodiment, the upper surface material 30 of the upper box 20 is provided with an insertion portion 33 for passing the nozzle 204 of the sprayer, but it is also possible to provide one or more insertion portions 33 on the side of the upper box 20 for the purpose of improving the operability of the sprayer, spraying the inhibitor evenly to the target area, etc. The same applies to the insertion portion 32 for passing the nozzle 203 of the vacuum cleaner. In addition, it is also possible to provide the removal device 1 with a handle or a hanging portion for carrying or lifting the removal device 1. In this embodiment, the lower box 10 and the upper box 20 of the removal device 1 are connected with a hook-and-loop fastener 40, but other connecting members may be used.

[0048] Furthermore, the lower box 10 and the upper box 20 of the removal device 1 are formed from polystyrene foam, but the materials of the lower box 10 and the upper box 20 are not limited to this. Furthermore, the covering material 4 in this embodiment contains asbestos, but it may contain other harmful substances such as RCF (refractory ceramic fiber). Alternatively, the removal device 1 of the present invention can also be applied to the removal of various covering materials 4 that do not contain such harmful substances.

[0049] Although the removal device 1 of this embodiment is used to remove the coating material 4 attached to the folded metal plate 3, it can also be applied to remove the coating material 4 attached to other members. In this case, the wall 12 of the lower box 10 and the wall 21 of the upper box 20 are shaped according to the cross-sectional shape of the member, and the cross-sectional shape is not particularly limited. Depending on the cross-sectional shape of the member, it is also possible to form only one of the walls 12, 21 into a shape according to the cross-sectional shape of the member.

[0050] Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to the above examples. It is clear that a person skilled in the art can come up with various modified or altered examples within the scope of the technical ideas disclosed in this application, and it is understood that these also naturally belong to the technical scope of the present invention. [Explanation of symbols]

[0051] 1:Removal device 2: Main unit 3: Metal folded plate 4: Covering material 10: Lower box 11: Bottom 12, 21: Wall part 20: Upper box 24: Mohair 30: Surface material 31: Gloves 32, 33: Insertion part 40: Velcro 121: Convex 203, 204: Nozzle 211: Recess 300: Folded roof

Claims

1. A removal device for removing a coating material attached to a component, comprising: A box-shaped main body including a lower box having an open top surface and an upper box having open top and bottom surfaces, for arranging the member sandwiched between the lower box and the upper box through an internal space; A transparent surface material provided on the upper surface of the upper box; A glove for inserting a hand into the internal space from the outside of the main body; having A removal device, characterized in that in at least one of the lower box and the upper box, a pair of opposing wall portions have a shape corresponding to the cross-sectional shape of the member.

2. 2. The removal device according to claim 1, further comprising an insertion portion for inserting a nozzle used when removing the coating material.

3. 2. The removal device according to claim 1, wherein an elastic body having a gap is disposed between the walls of the upper box and the lower box.

4. 4. The device of claim 3, wherein said elastic body is mohair.

5. 2. The removal device according to claim 1, further comprising a hook-and-loop fastener for detachably connecting said upper box and said lower box.

6. A method for removing a coating material adhered to a component using the removal device according to claim 1, comprising the steps of: a step of sandwiching the member between the lower box and the upper box from above and below, thereby disposing the member so as to penetrate the main body; A method for removing the covering material, comprising inserting a hand into the glove and performing the task of removing the covering material in the internal space of the main body.

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